Valve Spring

Valve spring compression pressure
Intake (n @ spec. length) 680 N @) 30.19 mm (153 lbs. @ 1.18 inch)
Exhaust (n @ spec. length) 680 N @ 30.19 mm (153 lbs. @ 1.18 inch)
Valve spring free length (approximate)
Intake 46.8 mm (1.84 inch)
Exhaust 46.8 mm (1.84 inch)
Valve spring installed pressure n @ spec. length
Intake 228 N @ 39.99 mm (51 lbs. @ 1.57 inch)
Exhaust 228 N @ 39.99 mm (51 lbs. @ 1.57 inch)
Valve springs installed pressure n @ spec. length-service limit 10% Pressure Loss @ 30.09
Valve springs-out of square limit 1%